package com.demo.rxjavademo.utils;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;

/**
 * Created by Administrator on 2016/12/9.
 */

public class AppUtils {
    private AppUtils()
    {
        /* cannot be instantiated */
        throw new UnsupportedOperationException("cannot be instantiated");

    }

    /**
     * 获取应用程序名称
     */
    public static String getAppName(Context context)
    {
        try
        {
            PackageManager packageManager = context.getPackageManager();
            PackageInfo packageInfo = packageManager.getPackageInfo(
                    context.getPackageName(), 0);
            int labelRes = packageInfo.applicationInfo.labelRes;
            return context.getResources().getString(labelRes);
        }catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * [获取应用程序版本名称信息]
     *
     * @param context
     * @return 当前应用的版本名称
     */
    public static String getVersionName(Context context)
    {
        try
        {
            PackageManager packageManager = context.getPackageManager();
            PackageInfo packageInfo = packageManager.getPackageInfo(
                    context.getPackageName(), 0);
            return packageInfo.versionName;

        } catch (PackageManager.NameNotFoundException e)
        {
            e.printStackTrace();
        }
        return null;
    }
    /**
     * 获取APP当前版本号
     * @param context
     * @return
     */
    public static int getAppVersionCode(Context context){
        int versionCode=1;
        try {
            String packageName=context.getPackageName();
            PackageManager packageManager=context.getPackageManager();
            PackageInfo packageInfo=packageManager.getPackageInfo(packageName, 0);
            versionCode=packageInfo.versionCode;
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        return versionCode;
    }
}
